Chapter 11, Problem 81AE

(a)

Interpretation Introduction

Interpretation:

The valence level orbital on the central atoms of $B{F}_3$ and $N{F}_3$ has to be compared.

(b)

Interpretation Introduction

Interpretation:

The shape of $B{F}_3$ and $N{F}_3$ has to be compared.

(c)

Interpretation Introduction

Interpretation:

The number of lone pairs on the central atoms of $B{F}_3$ and $N{F}_3$ has to be identified.

(d)

Interpretation Introduction

Interpretation:

The type and number of bonds found in $B{F}_3$ and $N{F}_3$ has to be identified.

Concept Introduction:

An electronegativity of an atom gives information about the strength that the atom has for attracting a pair of shared electrons.  The greater the attraction for a pair of shared electrons when the electronegativity value is high.  Consequently, when two different electronegative atoms share a pair of electrons, one atom becomes partially positive and the other atom becomes partially negative due to the attractive forces for the pair of electrons.